Larian Studios Forums Baldur's Gate III Baldur's Gate III - General Spoiler ~ Merchants, Attitude, Charisma & Costs

Wow I did the same tests over the holidays recording data at the 100G price after verifying at higher prices in order to read it as percent of base item value. All my numbers are exactly 1/10th of yours rounded.

Any toon of any charisma can buy attitude to max for 200G. The game does track this value over more than 1 transaction with the vendor changes appearing to scale up to max. You can do this directly by just giving the vendor 200G in one go or over time in the form of gold directly and/or items. The "value" of an item toward buying attitude is the amount shown in the vendor trade screen when you add it to a sell slot NOT the value listed on the item itself. As shown in the data above lower charisma toons will have to donate more in items to max attitude since the items "value" is less.